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path: root/kernel/drivers/usb/renesas_usbhs/rcar2.c
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Diffstat (limited to 'kernel/drivers/usb/renesas_usbhs/rcar2.c')
-rw-r--r--kernel/drivers/usb/renesas_usbhs/rcar2.c110
1 files changed, 110 insertions, 0 deletions
diff --git a/kernel/drivers/usb/renesas_usbhs/rcar2.c b/kernel/drivers/usb/renesas_usbhs/rcar2.c
new file mode 100644
index 000000000..8fc15c0ba
--- /dev/null
+++ b/kernel/drivers/usb/renesas_usbhs/rcar2.c
@@ -0,0 +1,110 @@
+/*
+ * Renesas USB driver R-Car Gen. 2 initialization and power control
+ *
+ * Copyright (C) 2014 Ulrich Hecht
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/gpio.h>
+#include <linux/of_gpio.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_data/gpio-rcar.h>
+#include <linux/usb/phy.h>
+#include "common.h"
+#include "rcar2.h"
+
+static int usbhs_rcar2_hardware_init(struct platform_device *pdev)
+{
+ struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
+
+ if (IS_ENABLED(CONFIG_GENERIC_PHY)) {
+ struct phy *phy = phy_get(&pdev->dev, "usb");
+
+ if (IS_ERR(phy))
+ return PTR_ERR(phy);
+
+ priv->phy = phy;
+ return 0;
+ }
+
+ if (IS_ENABLED(CONFIG_USB_PHY)) {
+ struct usb_phy *usb_phy = usb_get_phy_dev(&pdev->dev, 0);
+
+ if (IS_ERR(usb_phy))
+ return PTR_ERR(usb_phy);
+
+ priv->usb_phy = usb_phy;
+ return 0;
+ }
+
+ return -ENXIO;
+}
+
+static int usbhs_rcar2_hardware_exit(struct platform_device *pdev)
+{
+ struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
+
+ if (priv->phy) {
+ phy_put(priv->phy);
+ priv->phy = NULL;
+ }
+
+ if (priv->usb_phy) {
+ usb_put_phy(priv->usb_phy);
+ priv->usb_phy = NULL;
+ }
+
+ return 0;
+}
+
+static int usbhs_rcar2_power_ctrl(struct platform_device *pdev,
+ void __iomem *base, int enable)
+{
+ struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
+ int retval = -ENODEV;
+
+ if (priv->phy) {
+ if (enable) {
+ retval = phy_init(priv->phy);
+
+ if (!retval)
+ retval = phy_power_on(priv->phy);
+ } else {
+ phy_power_off(priv->phy);
+ phy_exit(priv->phy);
+ retval = 0;
+ }
+ }
+
+ if (priv->usb_phy) {
+ if (enable) {
+ retval = usb_phy_init(priv->usb_phy);
+
+ if (!retval)
+ retval = usb_phy_set_suspend(priv->usb_phy, 0);
+ } else {
+ usb_phy_set_suspend(priv->usb_phy, 1);
+ usb_phy_shutdown(priv->usb_phy);
+ retval = 0;
+ }
+ }
+
+ return retval;
+}
+
+static int usbhs_rcar2_get_id(struct platform_device *pdev)
+{
+ return USBHS_GADGET;
+}
+
+const struct renesas_usbhs_platform_callback usbhs_rcar2_ops = {
+ .hardware_init = usbhs_rcar2_hardware_init,
+ .hardware_exit = usbhs_rcar2_hardware_exit,
+ .power_ctrl = usbhs_rcar2_power_ctrl,
+ .get_id = usbhs_rcar2_get_id,
+};